Amino acid–functionalized carbon quantum dots for selective detection of Al3+ ions and fluorescence imaging in living cells

Yan, Chaoren; Guo, Liulong; Shao, Xu; Shu, Qi; Guan, Ping; Wang, Jingwei; Hu, Xiaoling; Wang, Chaoli

doi:10.1007/s00216-021-03348-x

Cited by 26 publications

(6 citation statements)

References 44 publications

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“…Yan et al designed CQDs exhibiting three excitation peaks and excitation-independent emission. Apart from Trp and Gly, glucose was used as the precursor, and CQDs were tested toward the selective detection of Al 3+ . The most comprehensive studies of CQDs synthesized using AAs were performed by Pandit et al, where CQDs were synthesized via a hydrothermal method in the presence of CA.…”

Section: Resultsmentioning

confidence: 99%

“…Apart from Trp and Gly, glucose was used as the precursor, and CQDs were tested toward the selective detection of Al 3+ . 64 The most comprehensive studies of CQDs synthesized using AAs were performed by Pandit et al, 65 where CQDs were synthesized via a hydrothermal method in the presence of CA. Nonetheless, it should be emphasized that the QY for the so-obtained CQDs is far from the results presented in our work.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Carbon Quantum Dots from Amino Acids Revisited: Survey of Renewable Precursors toward High Quantum-Yield Blue and Green Fluorescence

et al. 2022

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Carbon quantum dots (CQDs) were synthesized via a green, one-step hydrothermal method. As CQD precursors, nine amino acids of different structural descriptors (negatively/positively charged in water, polar, hydrophobic, sulfur-containing, and other/complex ones) were surveyed: Asp, Cys, Gly, His, Leu, Lys, Phe, Pro, and Ser. The reactions were performed in an autoclave in the presence of citric acid at 180 °C for 24 h and yielded core–shell CQDs. CQDs were comprehensively characterized by transmission electron microscopy, dynamic light scattering, Raman, UV/Vis, infrared, X-ray photoelectron spectroscopy, and fluorescence spectroscopy. At the excitation wavelength of λex = 350 nm, Cys-, Phe-, Leu-, and Lys-based CQDs displayed the highest quantum yield blue fluorescence90 ± 5, 90 ± 4, 87 ± 5, and 67 ± 3%, respectivelysuperior to the conventional fluorescent dyes. Strikingly, for Lys- and Phe-CQDs, dissimilar trends in the excitation–emission wavelength relationships were identified, that is, constantly strong red shifts versus excitation wavelength-independent emission. Cys- and Lys-CQDs were water-dispersible toward the narrow unimodal distribution of hydrodynamic diameters0.6 and 2.5 nm, respectively. Additionally, Lys- and Cys-CQDs, with high absolute zeta potential values, formed stable aqueous colloids in a broad range of pH (2, 7, and 12). The results constitute important premises for water-based applications of CQDs, such as bioimaging or photocatalysis.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Carbon Quantum Dots from Amino Acids Revisited: Survey of Renewable Precursors toward High Quantum-Yield Blue and Green Fluorescence

et al. 2022

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“…C-H stretching vibration was evident at peaks 2923 and 2854 cm -1 [12,13]. In the meantime, the broad O-H absorption is responsible for the peaks at 3331 cm -1 [14]. As a result, the FTIR study demonstrates that the surface of gCDs contains significant functional groups, including C=O, C=C, C-O, and O-H.…”

Section: Ftir Characterizationmentioning

confidence: 86%

Synthesis of Green Carbon Dots from Nephelium Lappaceum L. Seeds

Kamali,

Hamdiani,

Hermanto

et al. 2024

J. Pijar.MIPA

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In this study, rambutan (Nephelium Lappaceum L.) seeds were used to fabricate green carbon dots (gCDs) by employing a hydrothermal process. The synthesized CDs were evaluated using Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) for the structural properties as well as UV-Vis and fluorescence spectrophotometry for the optical properties. UV-Vis examination revealed that the produced gCDs showed emission-dependent photoluminescence excitation, with two absorption peaks at 265 nm and 330 nm. The presence of functional groups and chemical composition such as C=C, C=O, -COOH, and -OH on the surface of gCDs was confirmed by the results of FTIR and XPS spectra. Consequently, gCDs present several opportunities for exploration in a range of applications.

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“…prepared amino acids functionalized CQDs (AA‐CQDs) for Al 3+ selective biosensors. [ 491 ] As‐prepared AA‐CQDs exhibited a triple‐excitation feature and single‐color fluorescence with a high quantum yield (24.23%) and longer lifetime (13.29 ns). Furthermore, AA‐CQDs demonstrated high Al 3+ selectivity and sensitivity with strong fluorescence enhancement, where a good linear relation between the fluorescence intensity and Al 3+ concentration was observed from 1 to 20 µmol L −1 .…”

Section: Applicationsmentioning

confidence: 99%

Emerging Trends of Carbon‐Based Quantum Dots: Nanoarchitectonics and Applications

Guan

Geng

et al. 2023

Small

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Amino acid–functionalized carbon quantum dots for selective detection of Al3+ ions and fluorescence imaging in living cells

Cited by 26 publications

References 44 publications

Carbon Quantum Dots from Amino Acids Revisited: Survey of Renewable Precursors toward High Quantum-Yield Blue and Green Fluorescence

Carbon Quantum Dots from Amino Acids Revisited: Survey of Renewable Precursors toward High Quantum-Yield Blue and Green Fluorescence

Synthesis of Green Carbon Dots from Nephelium Lappaceum L. Seeds

Emerging Trends of Carbon‐Based Quantum Dots: Nanoarchitectonics and Applications

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